Can you give a declamation piece about a daughter who suffers from killing her mother?

Well, I don't know if you a Christian or not. We are all on earth to learn and make mistakes. If you are truly sorry and want to be forgiven, first you have to ask God for forgiveness, then you have to forgive yourself. It is really hard to forget anything like that, especially if you did it. All I can say is to pray and remember your mother still loves you regardless of what you have done. She is in a better place right now. Don't let anyone speak negativily to you and try very hard to not dwell on it after you ask for forgiveness. Dwelling on bad things is just going to bring you down. You have to move on and try not to worry.